our first witness is mark kelly. he is a, first witness is mark kelly. he is a retired astronaut in u.s. navy captain. captain kelly recently cofounded americans for responsible solutions. this is an advocacy group that promotes solutions to prevent gun violence, and protect responsible gun ownership. did it with his wife, former congresswoman gabrielle giffords. so, captain kelly, please go ahead, sir. >> thank you, chairman leahy and ranking member grassley for inviting me here today ? . >> we are simply two reasonable americans who have said, enough. on january 8th of 2011 a young man walked up to gabby at her constituent event in tucson, leveled his gun and shot her through the head. he then turned down the line and continued firing. in 15 seconds he emptied his magazine. it contained 33 bullets and there were 33 wounds. as the shooter attempted to reload he fumbled. a woman grabbed the next magazine, and others restrained him. gabby was the first victim. christina taylor green, nine years old, born on 9-11-2001 was shot with the 13th bullet or after